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https://issues.apache.org/jira/browse/WW-4559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14987441#comment-14987441
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Rene Gielen commented on WW-4559:
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It looks like your autowiring strategy is set to "type". See
https://struts.apache.org/docs/spring-plugin.html#Autowiring
Please try to set your strategy explicitly to "name" or "no" and check again.
> Define a bean of java.io.FileInputStream in Spring makes the Struts stream
> result not work
> ------------------------------------------------------------------------------------------
>
> Key: WW-4559
> URL: https://issues.apache.org/jira/browse/WW-4559
> Project: Struts 2
> Issue Type: Bug
> Components: Dispatch Filter
> Reporter: Alireza Fattahi
> Fix For: 2.3.x
>
>
> In a strust2 + Spring 4 project
> Consider a simple action with stream result
> {code:title=Bar.java|borderStyle=solid}
> @Action(value = "sample-export",
> results = { @Result(name = "success", type = "stream", params = {
> "inputName", "exportInputStream", "contentType",
> "${exportContentType}; charset=UTF-8", "Content-Disposition",
> "attachment; filename=\"${filename}\"", "contentDisposition",
> "attachment; filename=\"${filename}\"", "bufferSize", "2048" }) })
> public String export() throws ClientException {
> //buildExportInputStream() creates and returns new ByteArrayOutputStream
> by using jasper
> exportInputStream = buildExportInputStream();
> LOG.debug("Exporting to {} file ", getFilename());
> return SUCCESS;
> }
> {code}
> This works fine,
> Now define a bean
> {code:xml}
> <bean id="sampleStream" class="java.io.FileInputStream" >
> <constructor-arg value="c:/sample.jks"/>
> </bean>
> {code}
> The export will not work correctly any more, first time you get the
> c:/sample.jks as file and then an error which same stream already closed.
> I have found that the sampleStream will be autowired to
> org.apache.struts2.dispatcher.StreamResult and I see this log:
> {panel:title=LOG|borderStyle=dashed|borderColor=#ccc|titleBGColor=#F7D6C1|bgColor=#FFFFCE}
> DEBUG ort.DefaultListableBeanFactory Returning cached instance of singleton
> bean 'sampleStream'
> DEBUG ort.DefaultListableBeanFactory Autowiring by type from bean name
> 'org.apache.struts2.dispatcher.StreamResult' via constructor to bean named
> 'sampleStream'
> {panel}
> This mistaken autowired is the source of problem ! Is there any workaround.
> And by the way, why the sampleStream is autowired here !
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